Optical storage device, recording method of optical storage medium and program
US7548495B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2005 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Nov 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/00458
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write retry processing unit repeats a write retry operation of a write and a verify, while performing a setting change of a focus offset for recording a data on an optical storage medium in case a verify error occurs in executing the write and a verify try fails. A learning processing unit retains a sum total of the number of adding times of the successful focus offset and the number of subtracting times of the successful retry offset as a learning result at the successful time of the write retry, and a write condition changing unit changes the focus offset setting value of the default so as to be drawn near to the latest focus offset which succeeds in the retry when the absolute value of the learning result retained in the learning processing unit is equal to or more than a threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.